As the "Printer Spooler" service isn´t needed on the OS it should be disabled. To do that change the startup type from automatically to disabled. Then stop the service fully. This normally disabled also the printer sharing, however not on every environment. So open the computer management and go to "Shared Folders" then "Shares" and disable the printer share.

6.) Rename the Administrator and Guest accounts

Make sure that the default Admin Account and Guest Account are renamed (e.g. RENAdministrator and RENGuest; but you should choose your own idea here!)

7.) Make sure that the default Admin Account and Guest Account require a password.